The Mediterranean diet is based on the consumption of plenty of fruits and vegetables, grains, beans, nuts, cheese, fish, poultry, and olive oil.
Some of the lowest rates of heart disease in the world occur in Mediterranean countries, even though the diet contains as much fat as the U.S. diet. Most of the fat, however, is in the form of heart-healthy monounsaturated fat found in olive oil and most nuts and omega-3 fatty acids found in many fish and grains.